带泵柴油机油底壳内机油油面应在上、下限刻线间偏上,按质换油,大约每()小时进行换油。
A、250
B、500
C、200
D、600
参考答案:B
If ________ the same treatment again, he is sure to get well. [ ]
A. giving
B. give
C. given
D. being given
泫患者首先应考虑的诊断是
A.消化性溃疡
B.急性胃粘膜损害
C.食管贲门粘膜撕裂综合征
D.胃癌
E.胃粘膜脱垂